For more details, see 
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/

No changes




-1 overall


The following subsystems voted -1:
    asflicense findbugs hadolint jshint pathlen unit xml


The following subsystems voted -1 but
were configured to be filtered/ignored:
    cc checkstyle javac javadoc pylint shellcheck shelldocs whitespace


The following subsystems are considered long running:
(runtime bigger than 1h  0m  0s)
    unit


Specific tests:

    XML :

       Parsing Error(s): 
       
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/conf/empty-configuration.xml
 
       hadoop-tools/hadoop-azure/src/config/checkstyle-suppressions.xml 
       hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/public/crossdomain.xml 
       
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/src/main/webapp/public/crossdomain.xml
 

    findbugs :

       module:hadoop-common-project/hadoop-minikdc 
       Possible null pointer dereference in 
org.apache.hadoop.minikdc.MiniKdc.delete(File) due to return value of called 
method Dereferenced at 
MiniKdc.java:org.apache.hadoop.minikdc.MiniKdc.delete(File) due to return value 
of called method Dereferenced at MiniKdc.java:[line 515] 

    findbugs :

       module:hadoop-common-project/hadoop-auth 
       
org.apache.hadoop.security.authentication.server.MultiSchemeAuthenticationHandler.authenticate(HttpServletRequest,
 HttpServletResponse) makes inefficient use of keySet iterator instead of 
entrySet iterator At MultiSchemeAuthenticationHandler.java:of keySet iterator 
instead of entrySet iterator At MultiSchemeAuthenticationHandler.java:[line 
192] 

    findbugs :

       module:hadoop-common-project/hadoop-common 
       org.apache.hadoop.crypto.CipherSuite.setUnknownValue(int) 
unconditionally sets the field unknownValue At CipherSuite.java:unknownValue At 
CipherSuite.java:[line 44] 
       org.apache.hadoop.crypto.CryptoProtocolVersion.setUnknownValue(int) 
unconditionally sets the field unknownValue At 
CryptoProtocolVersion.java:unknownValue At CryptoProtocolVersion.java:[line 67] 
       Possible null pointer dereference in 
org.apache.hadoop.fs.FileUtil.fullyDeleteOnExit(File) due to return value of 
called method Dereferenced at 
FileUtil.java:org.apache.hadoop.fs.FileUtil.fullyDeleteOnExit(File) due to 
return value of called method Dereferenced at FileUtil.java:[line 118] 
       Possible null pointer dereference in 
org.apache.hadoop.fs.RawLocalFileSystem.handleEmptyDstDirectoryOnWindows(Path, 
File, Path, File) due to return value of called method Dereferenced at 
RawLocalFileSystem.java:org.apache.hadoop.fs.RawLocalFileSystem.handleEmptyDstDirectoryOnWindows(Path,
 File, Path, File) due to return value of called method Dereferenced at 
RawLocalFileSystem.java:[line 383] 
       Useless condition:lazyPersist == true at this point At 
CommandWithDestination.java:[line 502] 
       org.apache.hadoop.io.DoubleWritable.compareTo(DoubleWritable) 
incorrectly handles double value At DoubleWritable.java: At 
DoubleWritable.java:[line 78] 
       org.apache.hadoop.io.DoubleWritable$Comparator.compare(byte[], int, int, 
byte[], int, int) incorrectly handles double value At DoubleWritable.java:int) 
incorrectly handles double value At DoubleWritable.java:[line 97] 
       org.apache.hadoop.io.FloatWritable.compareTo(FloatWritable) incorrectly 
handles float value At FloatWritable.java: At FloatWritable.java:[line 71] 
       org.apache.hadoop.io.FloatWritable$Comparator.compare(byte[], int, int, 
byte[], int, int) incorrectly handles float value At FloatWritable.java:int) 
incorrectly handles float value At FloatWritable.java:[line 89] 
       Possible null pointer dereference in 
org.apache.hadoop.io.IOUtils.listDirectory(File, FilenameFilter) due to return 
value of called method Dereferenced at 
IOUtils.java:org.apache.hadoop.io.IOUtils.listDirectory(File, FilenameFilter) 
due to return value of called method Dereferenced at IOUtils.java:[line 389] 
       Possible bad parsing of shift operation in 
org.apache.hadoop.io.file.tfile.Utils$Version.hashCode() At 
Utils.java:operation in 
org.apache.hadoop.io.file.tfile.Utils$Version.hashCode() At Utils.java:[line 
398] 
       
org.apache.hadoop.metrics2.lib.DefaultMetricsFactory.setInstance(MutableMetricsFactory)
 unconditionally sets the field mmfImpl At DefaultMetricsFactory.java:mmfImpl 
At DefaultMetricsFactory.java:[line 49] 
       
org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.setMiniClusterMode(boolean) 
unconditionally sets the field miniClusterMode At 
DefaultMetricsSystem.java:miniClusterMode At DefaultMetricsSystem.java:[line 
92] 
       Useless object stored in variable seqOs of method 
org.apache.hadoop.security.token.delegation.ZKDelegationTokenSecretManager.addOrUpdateToken(AbstractDelegationTokenIdentifier,
 AbstractDelegationTokenSecretManager$DelegationTokenInformation, boolean) At 
ZKDelegationTokenSecretManager.java:seqOs of method 
org.apache.hadoop.security.token.delegation.ZKDelegationTokenSecretManager.addOrUpdateToken(AbstractDelegationTokenIdentifier,
 AbstractDelegationTokenSecretManager$DelegationTokenInformation, boolean) At 
ZKDelegationTokenSecretManager.java:[line 886] 

    findbugs :

       module:hadoop-common-project 
       org.apache.hadoop.crypto.CipherSuite.setUnknownValue(int) 
unconditionally sets the field unknownValue At CipherSuite.java:unknownValue At 
CipherSuite.java:[line 44] 
       org.apache.hadoop.crypto.CryptoProtocolVersion.setUnknownValue(int) 
unconditionally sets the field unknownValue At 
CryptoProtocolVersion.java:unknownValue At CryptoProtocolVersion.java:[line 67] 
       Possible null pointer dereference in 
org.apache.hadoop.fs.FileUtil.fullyDeleteOnExit(File) due to return value of 
called method Dereferenced at 
FileUtil.java:org.apache.hadoop.fs.FileUtil.fullyDeleteOnExit(File) due to 
return value of called method Dereferenced at FileUtil.java:[line 118] 
       Possible null pointer dereference in 
org.apache.hadoop.fs.RawLocalFileSystem.handleEmptyDstDirectoryOnWindows(Path, 
File, Path, File) due to return value of called method Dereferenced at 
RawLocalFileSystem.java:org.apache.hadoop.fs.RawLocalFileSystem.handleEmptyDstDirectoryOnWindows(Path,
 File, Path, File) due to return value of called method Dereferenced at 
RawLocalFileSystem.java:[line 383] 
       Useless condition:lazyPersist == true at this point At 
CommandWithDestination.java:[line 502] 
       org.apache.hadoop.io.DoubleWritable.compareTo(DoubleWritable) 
incorrectly handles double value At DoubleWritable.java: At 
DoubleWritable.java:[line 78] 
       org.apache.hadoop.io.DoubleWritable$Comparator.compare(byte[], int, int, 
byte[], int, int) incorrectly handles double value At DoubleWritable.java:int) 
incorrectly handles double value At DoubleWritable.java:[line 97] 
       org.apache.hadoop.io.FloatWritable.compareTo(FloatWritable) incorrectly 
handles float value At FloatWritable.java: At FloatWritable.java:[line 71] 
       org.apache.hadoop.io.FloatWritable$Comparator.compare(byte[], int, int, 
byte[], int, int) incorrectly handles float value At FloatWritable.java:int) 
incorrectly handles float value At FloatWritable.java:[line 89] 
       Possible null pointer dereference in 
org.apache.hadoop.io.IOUtils.listDirectory(File, FilenameFilter) due to return 
value of called method Dereferenced at 
IOUtils.java:org.apache.hadoop.io.IOUtils.listDirectory(File, FilenameFilter) 
due to return value of called method Dereferenced at IOUtils.java:[line 389] 
       Possible bad parsing of shift operation in 
org.apache.hadoop.io.file.tfile.Utils$Version.hashCode() At 
Utils.java:operation in 
org.apache.hadoop.io.file.tfile.Utils$Version.hashCode() At Utils.java:[line 
398] 
       
org.apache.hadoop.metrics2.lib.DefaultMetricsFactory.setInstance(MutableMetricsFactory)
 unconditionally sets the field mmfImpl At DefaultMetricsFactory.java:mmfImpl 
At DefaultMetricsFactory.java:[line 49] 
       
org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.setMiniClusterMode(boolean) 
unconditionally sets the field miniClusterMode At 
DefaultMetricsSystem.java:miniClusterMode At DefaultMetricsSystem.java:[line 
92] 
       Possible null pointer dereference in 
org.apache.hadoop.minikdc.MiniKdc.delete(File) due to return value of called 
method Dereferenced at 
MiniKdc.java:org.apache.hadoop.minikdc.MiniKdc.delete(File) due to return value 
of called method Dereferenced at MiniKdc.java:[line 515] 
       
org.apache.hadoop.security.authentication.server.MultiSchemeAuthenticationHandler.authenticate(HttpServletRequest,
 HttpServletResponse) makes inefficient use of keySet iterator instead of 
entrySet iterator At MultiSchemeAuthenticationHandler.java:of keySet iterator 
instead of entrySet iterator At MultiSchemeAuthenticationHandler.java:[line 
192] 
       Useless object stored in variable seqOs of method 
org.apache.hadoop.security.token.delegation.ZKDelegationTokenSecretManager.addOrUpdateToken(AbstractDelegationTokenIdentifier,
 AbstractDelegationTokenSecretManager$DelegationTokenInformation, boolean) At 
ZKDelegationTokenSecretManager.java:seqOs of method 
org.apache.hadoop.security.token.delegation.ZKDelegationTokenSecretManager.addOrUpdateToken(AbstractDelegationTokenIdentifier,
 AbstractDelegationTokenSecretManager$DelegationTokenInformation, boolean) At 
ZKDelegationTokenSecretManager.java:[line 886] 

    findbugs :

       module:hadoop-hdfs-project/hadoop-hdfs-client 
       org.apache.hadoop.hdfs.server.protocol.SlowDiskReports.equals(Object) 
makes inefficient use of keySet iterator instead of entrySet iterator At 
SlowDiskReports.java:keySet iterator instead of entrySet iterator At 
SlowDiskReports.java:[line 105] 

    findbugs :

       module:hadoop-hdfs-project/hadoop-hdfs 
       Possible null pointer dereference in 
org.apache.hadoop.hdfs.qjournal.server.JournalNode.getJournalsStatus() due to 
return value of called method Dereferenced at 
JournalNode.java:org.apache.hadoop.hdfs.qjournal.server.JournalNode.getJournalsStatus()
 due to return value of called method Dereferenced at JournalNode.java:[line 
290] 
       
org.apache.hadoop.hdfs.server.common.HdfsServerConstants$StartupOption.setClusterId(String)
 unconditionally sets the field clusterId At HdfsServerConstants.java:clusterId 
At HdfsServerConstants.java:[line 195] 
       
org.apache.hadoop.hdfs.server.common.HdfsServerConstants$StartupOption.setForce(int)
 unconditionally sets the field force At HdfsServerConstants.java:force At 
HdfsServerConstants.java:[line 219] 
       
org.apache.hadoop.hdfs.server.common.HdfsServerConstants$StartupOption.setForceFormat(boolean)
 unconditionally sets the field isForceFormat At 
HdfsServerConstants.java:isForceFormat At HdfsServerConstants.java:[line 231] 
       
org.apache.hadoop.hdfs.server.common.HdfsServerConstants$StartupOption.setInteractiveFormat(boolean)
 unconditionally sets the field isInteractiveFormat At 
HdfsServerConstants.java:isInteractiveFormat At HdfsServerConstants.java:[line 
239] 
       Possible null pointer dereference in 
org.apache.hadoop.hdfs.server.datanode.DataStorage.linkBlocksHelper(File, File, 
int, HardLink, boolean, File, List) due to return value of called method 
Dereferenced at 
DataStorage.java:org.apache.hadoop.hdfs.server.datanode.DataStorage.linkBlocksHelper(File,
 File, int, HardLink, boolean, File, List) due to return value of called method 
Dereferenced at DataStorage.java:[line 1380] 
       Possible null pointer dereference in 
org.apache.hadoop.hdfs.server.namenode.NNStorageRetentionManager.purgeOldLegacyOIVImages(String,
 long) due to return value of called method Dereferenced at 
NNStorageRetentionManager.java:org.apache.hadoop.hdfs.server.namenode.NNStorageRetentionManager.purgeOldLegacyOIVImages(String,
 long) due to return value of called method Dereferenced at 
NNStorageRetentionManager.java:[line 258] 
       Possible null pointer dereference in 
org.apache.hadoop.hdfs.server.namenode.NNUpgradeUtil$1.visitFile(Path, 
BasicFileAttributes) due to return value of called method Dereferenced at 
NNUpgradeUtil.java:org.apache.hadoop.hdfs.server.namenode.NNUpgradeUtil$1.visitFile(Path,
 BasicFileAttributes) due to return value of called method Dereferenced at 
NNUpgradeUtil.java:[line 133] 
       Useless condition:argv.length >= 1 at this point At DFSAdmin.java:[line 
2140] 
       Useless condition:numBlocks == -1 at this point At 
ImageLoaderCurrent.java:[line 727] 

    findbugs :

       module:hadoop-hdfs-project 
       Possible null pointer dereference in 
org.apache.hadoop.hdfs.qjournal.server.JournalNode.getJournalsStatus() due to 
return value of called method Dereferenced at 
JournalNode.java:org.apache.hadoop.hdfs.qjournal.server.JournalNode.getJournalsStatus()
 due to return value of called method Dereferenced at JournalNode.java:[line 
290] 
       
org.apache.hadoop.hdfs.server.common.HdfsServerConstants$StartupOption.setClusterId(String)
 unconditionally sets the field clusterId At HdfsServerConstants.java:clusterId 
At HdfsServerConstants.java:[line 195] 
       
org.apache.hadoop.hdfs.server.common.HdfsServerConstants$StartupOption.setForce(int)
 unconditionally sets the field force At HdfsServerConstants.java:force At 
HdfsServerConstants.java:[line 219] 
       
org.apache.hadoop.hdfs.server.common.HdfsServerConstants$StartupOption.setForceFormat(boolean)
 unconditionally sets the field isForceFormat At 
HdfsServerConstants.java:isForceFormat At HdfsServerConstants.java:[line 231] 
       
org.apache.hadoop.hdfs.server.common.HdfsServerConstants$StartupOption.setInteractiveFormat(boolean)
 unconditionally sets the field isInteractiveFormat At 
HdfsServerConstants.java:isInteractiveFormat At HdfsServerConstants.java:[line 
239] 
       Possible null pointer dereference in 
org.apache.hadoop.hdfs.server.datanode.DataStorage.linkBlocksHelper(File, File, 
int, HardLink, boolean, File, List) due to return value of called method 
Dereferenced at 
DataStorage.java:org.apache.hadoop.hdfs.server.datanode.DataStorage.linkBlocksHelper(File,
 File, int, HardLink, boolean, File, List) due to return value of called method 
Dereferenced at DataStorage.java:[line 1380] 
       Possible null pointer dereference in 
org.apache.hadoop.hdfs.server.namenode.NNStorageRetentionManager.purgeOldLegacyOIVImages(String,
 long) due to return value of called method Dereferenced at 
NNStorageRetentionManager.java:org.apache.hadoop.hdfs.server.namenode.NNStorageRetentionManager.purgeOldLegacyOIVImages(String,
 long) due to return value of called method Dereferenced at 
NNStorageRetentionManager.java:[line 258] 
       Possible null pointer dereference in 
org.apache.hadoop.hdfs.server.namenode.NNUpgradeUtil$1.visitFile(Path, 
BasicFileAttributes) due to return value of called method Dereferenced at 
NNUpgradeUtil.java:org.apache.hadoop.hdfs.server.namenode.NNUpgradeUtil$1.visitFile(Path,
 BasicFileAttributes) due to return value of called method Dereferenced at 
NNUpgradeUtil.java:[line 133] 
       org.apache.hadoop.hdfs.server.protocol.SlowDiskReports.equals(Object) 
makes inefficient use of keySet iterator instead of entrySet iterator At 
SlowDiskReports.java:keySet iterator instead of entrySet iterator At 
SlowDiskReports.java:[line 105] 
       Useless condition:argv.length >= 1 at this point At DFSAdmin.java:[line 
2140] 
       Useless condition:numBlocks == -1 at this point At 
ImageLoaderCurrent.java:[line 727] 

    findbugs :

       module:hadoop-yarn-project/hadoop-yarn 
       Useless object stored in variable removedNullContainers of method 
org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.removeOrTrackCompletedContainersFromContext(List)
 At NodeStatusUpdaterImpl.java:removedNullContainers of method 
org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.removeOrTrackCompletedContainersFromContext(List)
 At NodeStatusUpdaterImpl.java:[line 664] 
       
org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.removeVeryOldStoppedContainersFromCache()
 makes inefficient use of keySet iterator instead of entrySet iterator At 
NodeStatusUpdaterImpl.java:keySet iterator instead of entrySet iterator At 
NodeStatusUpdaterImpl.java:[line 741] 
       
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ContainerLocalizer.createStatus()
 makes inefficient use of keySet iterator instead of entrySet iterator At 
ContainerLocalizer.java:keySet iterator instead of entrySet iterator At 
ContainerLocalizer.java:[line 359] 
       
org.apache.hadoop.yarn.server.nodemanager.containermanager.monitor.ContainerMetrics.usageMetrics
 is a mutable collection which should be package protected At 
ContainerMetrics.java:which should be package protected At 
ContainerMetrics.java:[line 134] 
       Boxed value is unboxed and then immediately reboxed in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnRWHelper.readResultsWithTimestamps(Result,
 byte[], byte[], KeyConverter, ValueConverter, boolean) At 
ColumnRWHelper.java:then immediately reboxed in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnRWHelper.readResultsWithTimestamps(Result,
 byte[], byte[], KeyConverter, ValueConverter, boolean) At 
ColumnRWHelper.java:[line 335] 
       
org.apache.hadoop.yarn.state.StateMachineFactory.generateStateGraph(String) 
makes inefficient use of keySet iterator instead of entrySet iterator At 
StateMachineFactory.java:keySet iterator instead of entrySet iterator At 
StateMachineFactory.java:[line 505] 

    findbugs :

       module:hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common 
       
org.apache.hadoop.yarn.state.StateMachineFactory.generateStateGraph(String) 
makes inefficient use of keySet iterator instead of entrySet iterator At 
StateMachineFactory.java:keySet iterator instead of entrySet iterator At 
StateMachineFactory.java:[line 505] 

    findbugs :

       module:hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server 
       Useless object stored in variable removedNullContainers of method 
org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.removeOrTrackCompletedContainersFromContext(List)
 At NodeStatusUpdaterImpl.java:removedNullContainers of method 
org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.removeOrTrackCompletedContainersFromContext(List)
 At NodeStatusUpdaterImpl.java:[line 664] 
       
org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.removeVeryOldStoppedContainersFromCache()
 makes inefficient use of keySet iterator instead of entrySet iterator At 
NodeStatusUpdaterImpl.java:keySet iterator instead of entrySet iterator At 
NodeStatusUpdaterImpl.java:[line 741] 
       
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ContainerLocalizer.createStatus()
 makes inefficient use of keySet iterator instead of entrySet iterator At 
ContainerLocalizer.java:keySet iterator instead of entrySet iterator At 
ContainerLocalizer.java:[line 359] 
       
org.apache.hadoop.yarn.server.nodemanager.containermanager.monitor.ContainerMetrics.usageMetrics
 is a mutable collection which should be package protected At 
ContainerMetrics.java:which should be package protected At 
ContainerMetrics.java:[line 134] 
       Boxed value is unboxed and then immediately reboxed in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnRWHelper.readResultsWithTimestamps(Result,
 byte[], byte[], KeyConverter, ValueConverter, boolean) At 
ColumnRWHelper.java:then immediately reboxed in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnRWHelper.readResultsWithTimestamps(Result,
 byte[], byte[], KeyConverter, ValueConverter, boolean) At 
ColumnRWHelper.java:[line 335] 

    findbugs :

       
module:hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager
 
       Useless object stored in variable removedNullContainers of method 
org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.removeOrTrackCompletedContainersFromContext(List)
 At NodeStatusUpdaterImpl.java:removedNullContainers of method 
org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.removeOrTrackCompletedContainersFromContext(List)
 At NodeStatusUpdaterImpl.java:[line 664] 
       
org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.removeVeryOldStoppedContainersFromCache()
 makes inefficient use of keySet iterator instead of entrySet iterator At 
NodeStatusUpdaterImpl.java:keySet iterator instead of entrySet iterator At 
NodeStatusUpdaterImpl.java:[line 741] 
       
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ContainerLocalizer.createStatus()
 makes inefficient use of keySet iterator instead of entrySet iterator At 
ContainerLocalizer.java:keySet iterator instead of entrySet iterator At 
ContainerLocalizer.java:[line 359] 
       
org.apache.hadoop.yarn.server.nodemanager.containermanager.monitor.ContainerMetrics.usageMetrics
 is a mutable collection which should be package protected At 
ContainerMetrics.java:which should be package protected At 
ContainerMetrics.java:[line 134] 

    findbugs :

       
module:hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase
 
       Boxed value is unboxed and then immediately reboxed in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnRWHelper.readResultsWithTimestamps(Result,
 byte[], byte[], KeyConverter, ValueConverter, boolean) At 
ColumnRWHelper.java:then immediately reboxed in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnRWHelper.readResultsWithTimestamps(Result,
 byte[], byte[], KeyConverter, ValueConverter, boolean) At 
ColumnRWHelper.java:[line 335] 

    findbugs :

       
module:hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/hadoop-yarn-server-timelineservice-hbase-client
 
       Boxed value is unboxed and then immediately reboxed in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnRWHelper.readResultsWithTimestamps(Result,
 byte[], byte[], KeyConverter, ValueConverter, boolean) At 
ColumnRWHelper.java:then immediately reboxed in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnRWHelper.readResultsWithTimestamps(Result,
 byte[], byte[], KeyConverter, ValueConverter, boolean) At 
ColumnRWHelper.java:[line 335] 

    findbugs :

       module:hadoop-yarn-project 
       Useless object stored in variable removedNullContainers of method 
org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.removeOrTrackCompletedContainersFromContext(List)
 At NodeStatusUpdaterImpl.java:removedNullContainers of method 
org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.removeOrTrackCompletedContainersFromContext(List)
 At NodeStatusUpdaterImpl.java:[line 664] 
       
org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.removeVeryOldStoppedContainersFromCache()
 makes inefficient use of keySet iterator instead of entrySet iterator At 
NodeStatusUpdaterImpl.java:keySet iterator instead of entrySet iterator At 
NodeStatusUpdaterImpl.java:[line 741] 
       
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ContainerLocalizer.createStatus()
 makes inefficient use of keySet iterator instead of entrySet iterator At 
ContainerLocalizer.java:keySet iterator instead of entrySet iterator At 
ContainerLocalizer.java:[line 359] 
       
org.apache.hadoop.yarn.server.nodemanager.containermanager.monitor.ContainerMetrics.usageMetrics
 is a mutable collection which should be package protected At 
ContainerMetrics.java:which should be package protected At 
ContainerMetrics.java:[line 134] 
       Boxed value is unboxed and then immediately reboxed in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnRWHelper.readResultsWithTimestamps(Result,
 byte[], byte[], KeyConverter, ValueConverter, boolean) At 
ColumnRWHelper.java:then immediately reboxed in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnRWHelper.readResultsWithTimestamps(Result,
 byte[], byte[], KeyConverter, ValueConverter, boolean) At 
ColumnRWHelper.java:[line 335] 
       
org.apache.hadoop.yarn.state.StateMachineFactory.generateStateGraph(String) 
makes inefficient use of keySet iterator instead of entrySet iterator At 
StateMachineFactory.java:keySet iterator instead of entrySet iterator At 
StateMachineFactory.java:[line 505] 

    findbugs :

       module:hadoop-mapreduce-project/hadoop-mapreduce-client 
       Primitive is boxed to call Long.compareTo(Long):Long.compareTo(Long): 
use Long.compare(long, long) instead At JVMId.java:[line 101] 
       Possible null pointer dereference in new 
org.apache.hadoop.mapred.LocalContainerLauncher(AppContext, 
TaskUmbilicalProtocol, ClassLoader) due to return value of called method 
Dereferenced at LocalContainerLauncher.java:new 
org.apache.hadoop.mapred.LocalContainerLauncher(AppContext, 
TaskUmbilicalProtocol, ClassLoader) due to return value of called method 
Dereferenced at LocalContainerLauncher.java:[line 124] 
       Possible null pointer dereference in 
org.apache.hadoop.mapred.LocalContainerLauncher$EventHandler.relocalize() due 
to return value of called method Dereferenced at 
LocalContainerLauncher.java:org.apache.hadoop.mapred.LocalContainerLauncher$EventHandler.relocalize()
 due to return value of called method Dereferenced at 
LocalContainerLauncher.java:[line 524] 
       org.apache.hadoop.mapred.Operation.jobACLNeeded field is public and 
mutable In Operation.java:mutable In Operation.java 
       org.apache.hadoop.mapred.Operation.qACLNeeded field is public and 
mutable In Operation.java:mutable In Operation.java 
       Possible null pointer dereference in 
org.apache.hadoop.mapreduce.v2.app.MRAppMaster.isJobNamePatternMatch(JobConf, 
String) due to return value of called method Dereferenced at 
MRAppMaster.java:org.apache.hadoop.mapreduce.v2.app.MRAppMaster.isJobNamePatternMatch(JobConf,
 String) due to return value of called method Dereferenced at 
MRAppMaster.java:[line 560] 
       Useless object stored in variable paths of method 
org.apache.hadoop.mapreduce.v2.hs.HistoryFileManager$HistoryFileInfo.moveToDone()
 At HistoryFileManager.java:paths of method 
org.apache.hadoop.mapreduce.v2.hs.HistoryFileManager$HistoryFileInfo.moveToDone()
 At HistoryFileManager.java:[line 416] 

    findbugs :

       
module:hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core
 
       Primitive is boxed to call Long.compareTo(Long):Long.compareTo(Long): 
use Long.compare(long, long) instead At JVMId.java:[line 101] 
       org.apache.hadoop.mapred.Operation.jobACLNeeded field is public and 
mutable In Operation.java:mutable In Operation.java 
       org.apache.hadoop.mapred.Operation.qACLNeeded field is public and 
mutable In Operation.java:mutable In Operation.java 

    findbugs :

       
module:hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app
 
       Possible null pointer dereference in new 
org.apache.hadoop.mapred.LocalContainerLauncher(AppContext, 
TaskUmbilicalProtocol, ClassLoader) due to return value of called method 
Dereferenced at LocalContainerLauncher.java:new 
org.apache.hadoop.mapred.LocalContainerLauncher(AppContext, 
TaskUmbilicalProtocol, ClassLoader) due to return value of called method 
Dereferenced at LocalContainerLauncher.java:[line 124] 
       Possible null pointer dereference in 
org.apache.hadoop.mapred.LocalContainerLauncher$EventHandler.relocalize() due 
to return value of called method Dereferenced at 
LocalContainerLauncher.java:org.apache.hadoop.mapred.LocalContainerLauncher$EventHandler.relocalize()
 due to return value of called method Dereferenced at 
LocalContainerLauncher.java:[line 524] 
       Possible null pointer dereference in 
org.apache.hadoop.mapreduce.v2.app.MRAppMaster.isJobNamePatternMatch(JobConf, 
String) due to return value of called method Dereferenced at 
MRAppMaster.java:org.apache.hadoop.mapreduce.v2.app.MRAppMaster.isJobNamePatternMatch(JobConf,
 String) due to return value of called method Dereferenced at 
MRAppMaster.java:[line 560] 

    findbugs :

       
module:hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs
 
       Useless object stored in variable paths of method 
org.apache.hadoop.mapreduce.v2.hs.HistoryFileManager$HistoryFileInfo.moveToDone()
 At HistoryFileManager.java:paths of method 
org.apache.hadoop.mapreduce.v2.hs.HistoryFileManager$HistoryFileInfo.moveToDone()
 At HistoryFileManager.java:[line 416] 

    findbugs :

       module:hadoop-mapreduce-project/hadoop-mapreduce-examples 
       Possible null pointer dereference in 
org.apache.hadoop.examples.pi.Parser.parse(File, Map) due to return value of 
called method Dereferenced at 
Parser.java:org.apache.hadoop.examples.pi.Parser.parse(File, Map) due to return 
value of called method Dereferenced at Parser.java:[line 70] 

    findbugs :

       module:hadoop-mapreduce-project 
       Possible null pointer dereference in 
org.apache.hadoop.examples.pi.Parser.parse(File, Map) due to return value of 
called method Dereferenced at 
Parser.java:org.apache.hadoop.examples.pi.Parser.parse(File, Map) due to return 
value of called method Dereferenced at Parser.java:[line 70] 
       Primitive is boxed to call Long.compareTo(Long):Long.compareTo(Long): 
use Long.compare(long, long) instead At JVMId.java:[line 101] 
       Possible null pointer dereference in new 
org.apache.hadoop.mapred.LocalContainerLauncher(AppContext, 
TaskUmbilicalProtocol, ClassLoader) due to return value of called method 
Dereferenced at LocalContainerLauncher.java:new 
org.apache.hadoop.mapred.LocalContainerLauncher(AppContext, 
TaskUmbilicalProtocol, ClassLoader) due to return value of called method 
Dereferenced at LocalContainerLauncher.java:[line 124] 
       Possible null pointer dereference in 
org.apache.hadoop.mapred.LocalContainerLauncher$EventHandler.relocalize() due 
to return value of called method Dereferenced at 
LocalContainerLauncher.java:org.apache.hadoop.mapred.LocalContainerLauncher$EventHandler.relocalize()
 due to return value of called method Dereferenced at 
LocalContainerLauncher.java:[line 524] 
       org.apache.hadoop.mapred.Operation.jobACLNeeded field is public and 
mutable In Operation.java:mutable In Operation.java 
       org.apache.hadoop.mapred.Operation.qACLNeeded field is public and 
mutable In Operation.java:mutable In Operation.java 
       Possible null pointer dereference in 
org.apache.hadoop.mapreduce.v2.app.MRAppMaster.isJobNamePatternMatch(JobConf, 
String) due to return value of called method Dereferenced at 
MRAppMaster.java:org.apache.hadoop.mapreduce.v2.app.MRAppMaster.isJobNamePatternMatch(JobConf,
 String) due to return value of called method Dereferenced at 
MRAppMaster.java:[line 560] 
       Useless object stored in variable paths of method 
org.apache.hadoop.mapreduce.v2.hs.HistoryFileManager$HistoryFileInfo.moveToDone()
 At HistoryFileManager.java:paths of method 
org.apache.hadoop.mapreduce.v2.hs.HistoryFileManager$HistoryFileInfo.moveToDone()
 At HistoryFileManager.java:[line 416] 

    findbugs :

       module:hadoop-tools/hadoop-rumen 
       Return value of org.codehaus.jackson.map.ObjectMapper.getJsonFactory() 
ignored, but method has no side effect At JsonObjectMapperWriter.java:but 
method has no side effect At JsonObjectMapperWriter.java:[line 59] 
       Return value of new 
org.apache.hadoop.tools.rumen.datatypes.DefaultDataType(String) ignored, but 
method has no side effect At MapReduceJobPropertiesParser.java:ignored, but 
method has no side effect At MapReduceJobPropertiesParser.java:[line 212] 

    findbugs :

       module:hadoop-tools/hadoop-gridmix 
       org.apache.hadoop.mapred.gridmix.InputStriper$1.compare(Map$Entry, 
Map$Entry) incorrectly handles double value At InputStriper.java:value At 
InputStriper.java:[line 136] 
       
org.apache.hadoop.mapred.gridmix.emulators.resourceusage.TotalHeapUsageEmulatorPlugin$DefaultHeapUsageEmulator.heapSpace
 is a mutable collection which should be package protected At 
TotalHeapUsageEmulatorPlugin.java:which should be package protected At 
TotalHeapUsageEmulatorPlugin.java:[line 132] 

    findbugs :

       module:hadoop-tools/hadoop-azure 
       Useless object stored in variable keysToUpdateAsFolder of method 
org.apache.hadoop.fs.azure.NativeAzureFileSystem.mkdirs(Path, FsPermission, 
boolean) At NativeAzureFileSystem.java:keysToUpdateAsFolder of method 
org.apache.hadoop.fs.azure.NativeAzureFileSystem.mkdirs(Path, FsPermission, 
boolean) At NativeAzureFileSystem.java:[line 3013] 
       Dead store to op in 
org.apache.hadoop.fs.azurebfs.AzureBlobFileSystemStore.access(Path, FsAction) 
At 
AzureBlobFileSystemStore.java:org.apache.hadoop.fs.azurebfs.AzureBlobFileSystemStore.access(Path,
 FsAction) At AzureBlobFileSystemStore.java:[line 901] 

    findbugs :

       module:hadoop-tools 
       Useless object stored in variable keysToUpdateAsFolder of method 
org.apache.hadoop.fs.azure.NativeAzureFileSystem.mkdirs(Path, FsPermission, 
boolean) At NativeAzureFileSystem.java:keysToUpdateAsFolder of method 
org.apache.hadoop.fs.azure.NativeAzureFileSystem.mkdirs(Path, FsPermission, 
boolean) At NativeAzureFileSystem.java:[line 3013] 
       Dead store to op in 
org.apache.hadoop.fs.azurebfs.AzureBlobFileSystemStore.access(Path, FsAction) 
At 
AzureBlobFileSystemStore.java:org.apache.hadoop.fs.azurebfs.AzureBlobFileSystemStore.access(Path,
 FsAction) At AzureBlobFileSystemStore.java:[line 901] 
       org.apache.hadoop.mapred.gridmix.InputStriper$1.compare(Map$Entry, 
Map$Entry) incorrectly handles double value At InputStriper.java:value At 
InputStriper.java:[line 136] 
       
org.apache.hadoop.mapred.gridmix.emulators.resourceusage.TotalHeapUsageEmulatorPlugin$DefaultHeapUsageEmulator.heapSpace
 is a mutable collection which should be package protected At 
TotalHeapUsageEmulatorPlugin.java:which should be package protected At 
TotalHeapUsageEmulatorPlugin.java:[line 132] 
       Return value of org.codehaus.jackson.map.ObjectMapper.getJsonFactory() 
ignored, but method has no side effect At JsonObjectMapperWriter.java:but 
method has no side effect At JsonObjectMapperWriter.java:[line 59] 
       Return value of new 
org.apache.hadoop.tools.rumen.datatypes.DefaultDataType(String) ignored, but 
method has no side effect At MapReduceJobPropertiesParser.java:ignored, but 
method has no side effect At MapReduceJobPropertiesParser.java:[line 212] 

    findbugs :

       module:root 
       org.apache.hadoop.crypto.CipherSuite.setUnknownValue(int) 
unconditionally sets the field unknownValue At CipherSuite.java:unknownValue At 
CipherSuite.java:[line 44] 
       org.apache.hadoop.crypto.CryptoProtocolVersion.setUnknownValue(int) 
unconditionally sets the field unknownValue At 
CryptoProtocolVersion.java:unknownValue At CryptoProtocolVersion.java:[line 67] 
       Possible null pointer dereference in 
org.apache.hadoop.examples.pi.Parser.parse(File, Map) due to return value of 
called method Dereferenced at 
Parser.java:org.apache.hadoop.examples.pi.Parser.parse(File, Map) due to return 
value of called method Dereferenced at Parser.java:[line 70] 
       Possible null pointer dereference in 
org.apache.hadoop.fs.FileUtil.fullyDeleteOnExit(File) due to return value of 
called method Dereferenced at 
FileUtil.java:org.apache.hadoop.fs.FileUtil.fullyDeleteOnExit(File) due to 
return value of called method Dereferenced at FileUtil.java:[line 118] 
       Possible null pointer dereference in 
org.apache.hadoop.fs.RawLocalFileSystem.handleEmptyDstDirectoryOnWindows(Path, 
File, Path, File) due to return value of called method Dereferenced at 
RawLocalFileSystem.java:org.apache.hadoop.fs.RawLocalFileSystem.handleEmptyDstDirectoryOnWindows(Path,
 File, Path, File) due to return value of called method Dereferenced at 
RawLocalFileSystem.java:[line 383] 
       Useless object stored in variable keysToUpdateAsFolder of method 
org.apache.hadoop.fs.azure.NativeAzureFileSystem.mkdirs(Path, FsPermission, 
boolean) At NativeAzureFileSystem.java:keysToUpdateAsFolder of method 
org.apache.hadoop.fs.azure.NativeAzureFileSystem.mkdirs(Path, FsPermission, 
boolean) At NativeAzureFileSystem.java:[line 3013] 
       Dead store to op in 
org.apache.hadoop.fs.azurebfs.AzureBlobFileSystemStore.access(Path, FsAction) 
At 
AzureBlobFileSystemStore.java:org.apache.hadoop.fs.azurebfs.AzureBlobFileSystemStore.access(Path,
 FsAction) At AzureBlobFileSystemStore.java:[line 901] 
       Useless condition:lazyPersist == true at this point At 
CommandWithDestination.java:[line 502] 
       Possible null pointer dereference in 
org.apache.hadoop.hdfs.qjournal.server.JournalNode.getJournalsStatus() due to 
return value of called method Dereferenced at 
JournalNode.java:org.apache.hadoop.hdfs.qjournal.server.JournalNode.getJournalsStatus()
 due to return value of called method Dereferenced at JournalNode.java:[line 
290] 
       
org.apache.hadoop.hdfs.server.common.HdfsServerConstants$StartupOption.setClusterId(String)
 unconditionally sets the field clusterId At HdfsServerConstants.java:clusterId 
At HdfsServerConstants.java:[line 195] 
       
org.apache.hadoop.hdfs.server.common.HdfsServerConstants$StartupOption.setForce(int)
 unconditionally sets the field force At HdfsServerConstants.java:force At 
HdfsServerConstants.java:[line 219] 
       
org.apache.hadoop.hdfs.server.common.HdfsServerConstants$StartupOption.setForceFormat(boolean)
 unconditionally sets the field isForceFormat At 
HdfsServerConstants.java:isForceFormat At HdfsServerConstants.java:[line 231] 
       
org.apache.hadoop.hdfs.server.common.HdfsServerConstants$StartupOption.setInteractiveFormat(boolean)
 unconditionally sets the field isInteractiveFormat At 
HdfsServerConstants.java:isInteractiveFormat At HdfsServerConstants.java:[line 
239] 
       Possible null pointer dereference in 
org.apache.hadoop.hdfs.server.datanode.DataStorage.linkBlocksHelper(File, File, 
int, HardLink, boolean, File, List) due to return value of called method 
Dereferenced at 
DataStorage.java:org.apache.hadoop.hdfs.server.datanode.DataStorage.linkBlocksHelper(File,
 File, int, HardLink, boolean, File, List) due to return value of called method 
Dereferenced at DataStorage.java:[line 1380] 
       Possible null pointer dereference in 
org.apache.hadoop.hdfs.server.namenode.NNStorageRetentionManager.purgeOldLegacyOIVImages(String,
 long) due to return value of called method Dereferenced at 
NNStorageRetentionManager.java:org.apache.hadoop.hdfs.server.namenode.NNStorageRetentionManager.purgeOldLegacyOIVImages(String,
 long) due to return value of called method Dereferenced at 
NNStorageRetentionManager.java:[line 258] 
       Possible null pointer dereference in 
org.apache.hadoop.hdfs.server.namenode.NNUpgradeUtil$1.visitFile(Path, 
BasicFileAttributes) due to return value of called method Dereferenced at 
NNUpgradeUtil.java:org.apache.hadoop.hdfs.server.namenode.NNUpgradeUtil$1.visitFile(Path,
 BasicFileAttributes) due to return value of called method Dereferenced at 
NNUpgradeUtil.java:[line 133] 
       org.apache.hadoop.hdfs.server.protocol.SlowDiskReports.equals(Object) 
makes inefficient use of keySet iterator instead of entrySet iterator At 
SlowDiskReports.java:keySet iterator instead of entrySet iterator At 
SlowDiskReports.java:[line 105] 
       Useless condition:argv.length >= 1 at this point At DFSAdmin.java:[line 
2140] 
       Useless condition:numBlocks == -1 at this point At 
ImageLoaderCurrent.java:[line 727] 
       org.apache.hadoop.io.DoubleWritable.compareTo(DoubleWritable) 
incorrectly handles double value At DoubleWritable.java: At 
DoubleWritable.java:[line 78] 
       org.apache.hadoop.io.DoubleWritable$Comparator.compare(byte[], int, int, 
byte[], int, int) incorrectly handles double value At DoubleWritable.java:int) 
incorrectly handles double value At DoubleWritable.java:[line 97] 
       org.apache.hadoop.io.FloatWritable.compareTo(FloatWritable) incorrectly 
handles float value At FloatWritable.java: At FloatWritable.java:[line 71] 
       org.apache.hadoop.io.FloatWritable$Comparator.compare(byte[], int, int, 
byte[], int, int) incorrectly handles float value At FloatWritable.java:int) 
incorrectly handles float value At FloatWritable.java:[line 89] 
       Possible null pointer dereference in 
org.apache.hadoop.io.IOUtils.listDirectory(File, FilenameFilter) due to return 
value of called method Dereferenced at 
IOUtils.java:org.apache.hadoop.io.IOUtils.listDirectory(File, FilenameFilter) 
due to return value of called method Dereferenced at IOUtils.java:[line 389] 
       Possible bad parsing of shift operation in 
org.apache.hadoop.io.file.tfile.Utils$Version.hashCode() At 
Utils.java:operation in 
org.apache.hadoop.io.file.tfile.Utils$Version.hashCode() At Utils.java:[line 
398] 
       Primitive is boxed to call Long.compareTo(Long):Long.compareTo(Long): 
use Long.compare(long, long) instead At JVMId.java:[line 101] 
       Possible null pointer dereference in new 
org.apache.hadoop.mapred.LocalContainerLauncher(AppContext, 
TaskUmbilicalProtocol, ClassLoader) due to return value of called method 
Dereferenced at LocalContainerLauncher.java:new 
org.apache.hadoop.mapred.LocalContainerLauncher(AppContext, 
TaskUmbilicalProtocol, ClassLoader) due to return value of called method 
Dereferenced at LocalContainerLauncher.java:[line 124] 
       Possible null pointer dereference in 
org.apache.hadoop.mapred.LocalContainerLauncher$EventHandler.relocalize() due 
to return value of called method Dereferenced at 
LocalContainerLauncher.java:org.apache.hadoop.mapred.LocalContainerLauncher$EventHandler.relocalize()
 due to return value of called method Dereferenced at 
LocalContainerLauncher.java:[line 524] 
       org.apache.hadoop.mapred.Operation.jobACLNeeded field is public and 
mutable In Operation.java:mutable In Operation.java 
       org.apache.hadoop.mapred.Operation.qACLNeeded field is public and 
mutable In Operation.java:mutable In Operation.java 
       org.apache.hadoop.mapred.gridmix.InputStriper$1.compare(Map$Entry, 
Map$Entry) incorrectly handles double value At InputStriper.java:value At 
InputStriper.java:[line 136] 
       
org.apache.hadoop.mapred.gridmix.emulators.resourceusage.TotalHeapUsageEmulatorPlugin$DefaultHeapUsageEmulator.heapSpace
 is a mutable collection which should be package protected At 
TotalHeapUsageEmulatorPlugin.java:which should be package protected At 
TotalHeapUsageEmulatorPlugin.java:[line 132] 
       Possible null pointer dereference in 
org.apache.hadoop.mapreduce.v2.app.MRAppMaster.isJobNamePatternMatch(JobConf, 
String) due to return value of called method Dereferenced at 
MRAppMaster.java:org.apache.hadoop.mapreduce.v2.app.MRAppMaster.isJobNamePatternMatch(JobConf,
 String) due to return value of called method Dereferenced at 
MRAppMaster.java:[line 560] 
       Useless object stored in variable paths of method 
org.apache.hadoop.mapreduce.v2.hs.HistoryFileManager$HistoryFileInfo.moveToDone()
 At HistoryFileManager.java:paths of method 
org.apache.hadoop.mapreduce.v2.hs.HistoryFileManager$HistoryFileInfo.moveToDone()
 At HistoryFileManager.java:[line 416] 
       
org.apache.hadoop.metrics2.lib.DefaultMetricsFactory.setInstance(MutableMetricsFactory)
 unconditionally sets the field mmfImpl At DefaultMetricsFactory.java:mmfImpl 
At DefaultMetricsFactory.java:[line 49] 
       
org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.setMiniClusterMode(boolean) 
unconditionally sets the field miniClusterMode At 
DefaultMetricsSystem.java:miniClusterMode At DefaultMetricsSystem.java:[line 
92] 
       Possible null pointer dereference in 
org.apache.hadoop.minikdc.MiniKdc.delete(File) due to return value of called 
method Dereferenced at 
MiniKdc.java:org.apache.hadoop.minikdc.MiniKdc.delete(File) due to return value 
of called method Dereferenced at MiniKdc.java:[line 515] 
       
org.apache.hadoop.security.authentication.server.MultiSchemeAuthenticationHandler.authenticate(HttpServletRequest,
 HttpServletResponse) makes inefficient use of keySet iterator instead of 
entrySet iterator At MultiSchemeAuthenticationHandler.java:of keySet iterator 
instead of entrySet iterator At MultiSchemeAuthenticationHandler.java:[line 
192] 
       Useless object stored in variable seqOs of method 
org.apache.hadoop.security.token.delegation.ZKDelegationTokenSecretManager.addOrUpdateToken(AbstractDelegationTokenIdentifier,
 AbstractDelegationTokenSecretManager$DelegationTokenInformation, boolean) At 
ZKDelegationTokenSecretManager.java:seqOs of method 
org.apache.hadoop.security.token.delegation.ZKDelegationTokenSecretManager.addOrUpdateToken(AbstractDelegationTokenIdentifier,
 AbstractDelegationTokenSecretManager$DelegationTokenInformation, boolean) At 
ZKDelegationTokenSecretManager.java:[line 886] 
       Return value of org.codehaus.jackson.map.ObjectMapper.getJsonFactory() 
ignored, but method has no side effect At JsonObjectMapperWriter.java:but 
method has no side effect At JsonObjectMapperWriter.java:[line 59] 
       Return value of new 
org.apache.hadoop.tools.rumen.datatypes.DefaultDataType(String) ignored, but 
method has no side effect At MapReduceJobPropertiesParser.java:ignored, but 
method has no side effect At MapReduceJobPropertiesParser.java:[line 212] 
       Useless object stored in variable removedNullContainers of method 
org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.removeOrTrackCompletedContainersFromContext(List)
 At NodeStatusUpdaterImpl.java:removedNullContainers of method 
org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.removeOrTrackCompletedContainersFromContext(List)
 At NodeStatusUpdaterImpl.java:[line 664] 
       
org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.removeVeryOldStoppedContainersFromCache()
 makes inefficient use of keySet iterator instead of entrySet iterator At 
NodeStatusUpdaterImpl.java:keySet iterator instead of entrySet iterator At 
NodeStatusUpdaterImpl.java:[line 741] 
       
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ContainerLocalizer.createStatus()
 makes inefficient use of keySet iterator instead of entrySet iterator At 
ContainerLocalizer.java:keySet iterator instead of entrySet iterator At 
ContainerLocalizer.java:[line 359] 
       
org.apache.hadoop.yarn.server.nodemanager.containermanager.monitor.ContainerMetrics.usageMetrics
 is a mutable collection which should be package protected At 
ContainerMetrics.java:which should be package protected At 
ContainerMetrics.java:[line 134] 
       Boxed value is unboxed and then immediately reboxed in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnRWHelper.readResultsWithTimestamps(Result,
 byte[], byte[], KeyConverter, ValueConverter, boolean) At 
ColumnRWHelper.java:then immediately reboxed in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnRWHelper.readResultsWithTimestamps(Result,
 byte[], byte[], KeyConverter, ValueConverter, boolean) At 
ColumnRWHelper.java:[line 335] 
       
org.apache.hadoop.yarn.state.StateMachineFactory.generateStateGraph(String) 
makes inefficient use of keySet iterator instead of entrySet iterator At 
StateMachineFactory.java:keySet iterator instead of entrySet iterator At 
StateMachineFactory.java:[line 505] 

    Failed junit tests :

       hadoop.hdfs.qjournal.server.TestJournalNodeRespectsBindHostKeys 
       hadoop.contrib.bkjournal.TestBookKeeperHACheckpoints 
       hadoop.contrib.bkjournal.TestBookKeeperHACheckpoints 
       
hadoop.yarn.server.resourcemanager.scheduler.fair.TestContinuousScheduling 
      

   jshint:

       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/diff-patch-jshint.txt
  [208K]

   cc:

       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/diff-compile-cc-root-jdkOracleCorporation-1.7.0_95-b00.txt
  [4.0K]

   javac:

       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/diff-compile-javac-root-jdkOracleCorporation-1.7.0_95-b00.txt
  [396K]

   cc:

       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/diff-compile-cc-root-jdkPrivateBuild-1.8.0_252-8u252-b09-1~16.04-b09.txt
  [4.0K]

   javac:

       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/diff-compile-javac-root-jdkPrivateBuild-1.8.0_252-8u252-b09-1~16.04-b09.txt
  [396K]

   checkstyle:

       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/diff-checkstyle-root.txt
  [16M]

   hadolint:

       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/diff-patch-hadolint.txt
  [4.0K]

   pathlen:

       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/pathlen.txt
  [12K]

   pylint:

       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/diff-patch-pylint.txt
  [60K]

   shellcheck:

       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/diff-patch-shellcheck.txt
  [56K]

   shelldocs:

       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/diff-patch-shelldocs.txt
  [8.0K]

   whitespace:

       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/whitespace-eol.txt
  [12M]
       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/whitespace-tabs.txt
  [1.3M]

   xml:

       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/xml.txt
  [12K]

   javadoc:

       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/diff-javadoc-javadoc-root-jdkOracleCorporation-1.7.0_95-b00.txt
  [20K]
       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/diff-javadoc-javadoc-root-jdkPrivateBuild-1.8.0_252-8u252-b09-1~16.04-b09.txt
  [1.5M]

   findbugs:

       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/branch-findbugs-hadoop-common-project_hadoop-minikdc-warnings.html
  [8.0K]
       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/branch-findbugs-hadoop-common-project_hadoop-auth-warnings.html
  [8.0K]
       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/branch-findbugs-hadoop-common-project_hadoop-common-warnings.html
  [20K]
       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/branch-findbugs-hadoop-common-project-warnings.html
  [20K]
       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/branch-findbugs-hadoop-hdfs-project_hadoop-hdfs-client-warnings.html
  [8.0K]
       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/branch-findbugs-hadoop-hdfs-project_hadoop-hdfs-warnings.html
  [16K]
       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/branch-findbugs-hadoop-hdfs-project-warnings.html
  [16K]
       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/branch-findbugs-hadoop-yarn-project_hadoop-yarn-warnings.html
  [16K]
       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/branch-findbugs-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-common-warnings.html
  [8.0K]
       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/branch-findbugs-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server-warnings.html
  [16K]
       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/branch-findbugs-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager-warnings.html
  [12K]
       
https://builds.apache.org/job/hadoop-qbt-branch-2.10-java7-linux-x86/737/artifact/out/branch-findbugs-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-timelineservice-hbase-warnings.html
  [8.0K]
       
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  [8.0K]
       
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